//
//  MJTTabBarItem.swift
//  swiftWeiBo
//
//  Created by MJT on 16/7/13.
//  Copyright © 2016年 MJT. All rights reserved.
//

import UIKit

class MJTTabBarItem: UITabBarItem {

   override var badgeValue: String? {
        didSet {
            let tabBarController = valueForKey("_target") as? UITabBarController
            for tabBarChild in tabBarController!.tabBar.subviews {
                if tabBarChild.isKindOfClass(NSClassFromString("UITabBarButton")!) {
                    for tabBarButtonChild in tabBarChild.subviews {
                        if tabBarButtonChild.isKindOfClass(NSClassFromString("_UIBadgeView")!) {
                            for badgeViewChild in tabBarButtonChild.subviews {
                                if badgeViewChild.isKindOfClass(NSClassFromString("_UIBadgeBackground")!) {
                                    print("终于找你,还好没有放弃")

                                    // 统计我们这个类里面有多少个成员变量
                                    var count: UInt32 = 0
                                    //  获取里面的成员列表
                                    let ivars = class_copyIvarList(NSClassFromString("_UIBadgeBackground")!, &count)

                                    for i in 0..<count {
                                        //  获取指定位置的成员
                                        let ivar = ivars[Int(i)]
                                        //  获取成员名字
                                        let name = ivar_getName(ivar)
                                        let type = ivar_getTypeEncoding(ivar)
                                        //  把获取的成员名字转字符串
                                        let nameStr = String(CString: name, encoding: NSUTF8StringEncoding)
                                        let typeStr = String(CString: type, encoding: NSUTF8StringEncoding)
//                                        print(nameStr)
//                                        print(typeStr)
                                        //  使用kvc方式给我们_image成员变量赋值
                                        if nameStr == "_image" {
                                            badgeViewChild.setValue(UIImage(named: "main_badge"), forKey: "_image")
                                        }

                                    }

                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
